wym by fork

You would be better off storing the index in a variable instead of using the indexOf method twice.

This is a solution I was looking for. Great job!

Where you have copied the array with the line, let s = signature you are mutating the original array, which in many cases may not be what you want and can be a source of bugs in your code. You would be better off using something like let s = [...signature]; or let s = Array.from(signature); so anything you now do to s does not affect signature.

added in the fork ~~

This is a clever recursive solution, I like it.

Clever use of the Math.ceil method.

This cracked me up, cheers for the laughs.

This cracked me up, cheers for the laughs.

I started using if statements and then after I wrote two of them I changed it for a switch statement.

I started using if statements and then after I wrote two of them I changed it for a switch statement.

I don't understand how this is a 6kyu kata. I've had harder 8kyu katas.

I don't understand how this is a 6kyu kata. I've had harder 8kyu katas.

I don't understand how this is a 6kyu kata. I've had harder 8kyu katas.

I don't understand how this is a 6kyu kata. I've had harder 8kyu katas.